Cheap flights from Idaho to London from £188

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 21/10. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LON
12 Oct — 19 Oct1
1 adult
1 adult, Economy

Cheap flight deals from Idaho to London

Keep the following information in mind while searching for Idaho to London flight deals. Data was last updated 12 September 2025.

Round-trip from

£436

One-way from

£188

Popular in

June

Cheapest in

October

Average price

£585
Virgin Atlantic
  • Virgin Atlantic
  • 6/10-22/10
  • 3 total stops
  • 31h 05m total
  • Idaho to London
21/10
  • 21/10
  • 1 total stop
  • 37h 03m total
  • Idaho to London
Highest demand for flights based on searches. 23% potential increase in price (£154 potential increase over avg. return price).
Cheapest flight prices on average. 5% potential price decrease (£26 potential savings vs. average return price).
Average for round-trip flights in September 2025

Find flight deals from Idaho to London

Cheapest flights from Idaho to London
Explore the most affordable flight options available from Idaho to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 September 2025.

Mon 6/1013:15IDA - LHR
1 stop13h 35mVirgin Atlantic
Wed 22/1011:45LHR - IDA
2 stops17h 30mVirgin Atlantic
Deal found 11/9£436
Tue 23/907:00BOI - LHR
1 stop22h 20mUnited Airlines
Wed 1/1009:30LHR - BOI
2 stops33h 09mUnited Airlines
Deal found 11/9£449
Tue 30/914:39BOI - LHR
1 stop14h 41mUnited Airlines
Fri 31/1011:10LHR - BOI
2 stops32h 19mUnited Airlines
Deal found 11/9£454
Mon 6/1006:00IDA - LHR
1 stop20h 50mDelta
Wed 22/1006:30LHR - IDA
2 stops22h 45mDelta
Deal found 12/9£455
Mon 6/1013:15IDA - LHR
2 stops18h 00mKLM
Wed 22/1006:30LHR - IDA
2 stops18h 43mKLM
Deal found 10/9£456
Tue 23/909:52BOI - LHR
2 stops16h 43mAir Canada
Wed 1/1009:30LHR - BOI
2 stops21h 14mAir Canada
Deal found 11/9£459
Tue 23/913:00BOI - LHR
1 stop13h 50mDelta
Wed 1/1006:15LHR - BOI
2 stops19h 01mDelta
Deal found 10/9£460
Wed 5/1106:00GEG - LHR
1 stop20h 00mDelta
Wed 19/1106:20LHR - GEG
2 stops20h 38mDelta
Deal found 11/9£460
Tue 21/1014:17GEG - LHR
1 stop14h 53mDelta
Tue 16/1206:30LHR - GEG
2 stops21h 39mDelta
Deal found 10/9£461
Tue 28/1013:00JAC - LHR
1 stop15h 00mKLM
Wed 5/1120:25LHR - JAC
2 stops25h 22mKLM
Deal found 11/9£461
Wed 15/1015:37GEG - LHR
1 stop14h 38mKLM
Wed 29/1006:30LHR - GEG
2 stops17h 14mKLM
Deal found 11/9£461
Tue 4/1107:15GEG - LHR
2 stops15h 50mDelta
Tue 11/1106:20LHR - GEG
2 stops21h 43mDelta
Deal found 12/9£464

Cheapflights Fare Finder

 
Customise your flight search to find flights from Idaho to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 12 September 2025.
Use the filters below to find and compare flights from Idaho to London that are best for you.

Fly from

Idaho

Fly to

London

Route

Depart

Return

Price

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Mon 6/10

13:15-09:50

1 stop13h 35m

London Heathrow

Wed 22/10

11:45-22:15

2 stops17h 30m

£436

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 23/9

07:00-12:20

1 stop22h 20m

London Heathrow

Wed 1/10

09:30-11:39

2 stops33h 09m

£449

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 30/9

09:45-11:50

2 stops19h 05m

London Heathrow

Fri 31/10

14:30-13:44

2 stops29h 14m

£454

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 30/9

14:39-12:20

1 stop14h 41m

London Heathrow

Fri 31/10

11:10-13:29

2 stops32h 19m

£454

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Mon 6/10

06:00-09:50

1 stop20h 50m

London Heathrow

Wed 22/10

06:30-22:15

2 stops22h 45m

£455

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Mon 6/10

13:15-14:15

2 stops18h 00m

London Heathrow

Wed 22/10

06:30-18:13

2 stops18h 43m

£456

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 15/10

07:00-12:20

1 stop22h 20m

London Heathrow

Wed 22/10

06:55-09:42

2 stops33h 47m

£459

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 23/9

13:00-09:50

1 stop13h 50m

London Heathrow

Wed 1/10

06:15-18:16

2 stops19h 01m

£460

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 5/11

07:15-10:30

1 stop19h 15m

London Heathrow

Wed 19/11

06:20-18:58

2 stops20h 38m

£460

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 12/11

06:00-07:05

1 stop17h 05m

London Heathrow

Wed 3/12

06:20-18:56

2 stops20h 36m

£460

Flights are sorted by cheapest return flights first.

Deals found on 10/9

Showing 1-10 of 60 results
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Best time to book a flight from Idaho to London

Have a flexible travel schedule? Discover the best time to fly to London from Idaho with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Idaho to London

What is the cheapest month to book a flight from Idaho to London?

Currently, January is the cheapest month in which you can book a flight from Idaho to London (average of £112). Flying from Idaho to London in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ID to LON?

Find hourly flight availability from Idaho to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 12 September 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Idaho to London as you normally would.

How much does it cost for a return flight from Idaho to London?

Related info for your journey

Find useful and relevant information for your journey from Idaho to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • How long is the flight from Idaho to London?

    A quick flight from Idaho to London can take about 13h 35m. Virgin Atlantic provides one of the quickest options available for as low as £436. The distance from Idaho to London is about 4705 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines to fly from Idaho to London one-way?

    The cheapest airline one-way is Air Canada, with whom users have recently found tickets for as low as £329. However, be on the lookout for offers from American Airlines and United Airlines, as they are both options that can get you from Idaho to London for a low price.

  • What are the most popular routes from Idaho to London?

  • Can I find deals for flights from Idaho to London that include hotel bookings?

    Yes. In addition to deals on Idaho to London flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Idaho to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho to London.

  • Can I find deals for business class flights from Idaho to London?

    Yes. Cheapflights offers flight deals from Idaho to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Idaho to London?

    Currently, January is the cheapest month in which you can book a flight from Idaho to London (average of £112). Flying from Idaho to London in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Idaho to London

See prices for flight routes from nearby airports that may be better suited for you.

Top airline flying from Idaho to London

Discover the top airline that operate flights from Idaho to London. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 12 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£475Average£886FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights

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Users can book flights with no change fees policies with our dedicated filters. Book flights from Idaho to London flexibly with Cheapflights today.

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